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OpenAdvisories
High · 7.5 Known exploited Public exploit CVE-2026-28318 EUVD-2026-34268GHSA-4vx4-vp54-mwmc

SolarWinds Serv-U Unauthenticated Denial of Service Vulnerability

Published Jun 4, 2026 · Updated Oct 21, 2026 · Assigned by SolarWinds

Vendor: SolarWinds Product: Serv-U

Description

SolarWinds Serv-U is susceptible to specially crafted POST requests that crash the Serv-U service without authentication using Content-Encoding: deflate. Mitigation steps are provided to secure customer environments in the SolarWinds Trust Center if you are unable to deploy the update

Affected products

VendorProductAffectedFixed
SolarWinds Serv-U ≤ 15.5.4 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 2 repositories

  • BishopFox/CVE-2026-28318-check ★ 1 · Jun 12, 2026

    Safely detect whether a SolarWinds Serv-U host is vulnerable to CVE-2026-28318

  • EaEa0001/servu-cve-2026-28318-poc ★ 1 · Jun 10, 2026

    SolarWinds Serv-U CVE-2026-28318: unauthenticated Content-Encoding: deflate crash. Root-cause analysis (invalid free of an interior pointer -> heap corruption) + DoS-only PoC. Fixed in 15.5.4 Hotfix …

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 2

References